Langevin 128X-A Installation and Service Manual

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Installation and Service Manual

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Langevin
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INSTALLATION AND
SERVICE MANUAL
TYPE 128X SERIES
AUDIO
20 Watt AMPLIFIERS
TRY 1H1S SAMPLE
NEW INSTANT LETTERING
DYELINE HEAT RESISTANT
J' ,Jt'JLht\
1 pr -Sl:Z._
EASY TO HANOU.: ·o· X ~;" r
SHEET
<;r
LANGEVIN, DIVISION OF SONOTEC, INC.
503 SOUTH GRAND AVENUE/ SANTA ANA, CALIFORNIA/ PHONE: (714) 547-6204
APRIL,1957
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SERVICE-AND INSTALLATION MANUAL FOR
LANGEVIN TYPE 128X SERIES AMPLIFIERS
GENERAL
The Langevin Type 128X series amplifiers are 20-watt units designed for operation in high-quality
sound systems. Design features make these amplifiers adaptable to the varied requirements of sound in-
stallations. These features include interchangeable input panels for line matching or bridging, for low-
impedance microphone or phono pickup inputs of 30 or 250 ohms impedance, for high-impedance inputs, such
as high-impedance microphones, phono pick-ups, and radio tuners, and for broadcast-type monitor use.
These input panels, while interchangeable, must be mounted on the basic amplifier and wired into the
circuit. The low output noise level and low internal output impedance permits the use of the 128X ampli-
fier as a power unit to drive a low impedance buss across which a number of power amplifiers can be
bridged in large sound installations. The Type 128X series amplifier can be either rack or cabinet
mounted.
BASIC 128X AMPLIFIER
GENERAL CHARACTERISTICS
The electrical characteristics of the 128X
amplifier are dependent upon and vary with the
particular type of input panel in use. These elec-
trical characteristics are given in detail in the
following service data for the individual input
panels.
The basic 128X amplifier is a three stage
amplifier consisting of a 6SJ7 voltage amplifier,
a 6V6 phase inverter and driver, and push-pull 6L6
tubes in the final power amplifier stage. Quiet,
low-distortion performance over a wide fre1uency
range at rated power output (20 Watts) highlights
the electrical characteristics which make these
amplifiers desirable where fine sound reinforce-
ment or reproduction is required,
All transformers are especially made for
these units in our own transformer shops, to in-
sure full control over the manufacturing process,
including winding, impregnating, potting and test-
ing. Potted coils assure longer life and uniform
characteristics despite variations in temperature
and humidity.
Electrically, this amplifier has low noise
level (78 db below full output) and excellent
transient response. Each amplifier is tested for
distortion at rated output over the entire fre-
1uency range from 50 to 15,000 cycles, assuring
full performance at tne frequency extremes as well
as over the miJdle range.
Since gain-per-stage measurements will vary
with the particular conditions existing at the
time of measurements, such as type of equipment
used and variations in line voltage, the values
given are to be considered as average values and
may vary by an appreciable amount. Tnese figures
will be valuable as references in ma~ing the serv-
ice checks on the amplifiers.
1
Good regulation of output is provided in the
Langevin 128X series by the very low internal out-
put impedance. The change in output level from a
condition of no load to a condition of full load
is only I db. In addition, a new circuit, incor-
porating direct coupling between the voltage am-
plifier and phase splitter stages, minimizes
circuit components and provides maximum gain and
reliability.
The power supply uses a 5U4G rectifier tube
and is filtered so that less than O.
1% ripple is
present in the output of the B supply. The power
transformer is tapped with different input termi-
nals for the 105-115 V range, and the 115-125 V
range, thus assuring a constant value of B voltage
over this wide range of input voltage.
The outJ:llt transformer is tapped so that
loads from 1 ohm up to 1200 ohms may be matched
for maximum output power.
Chassis la.rout has been arranged to reduce
interconnecting wiring to a minimum, thus provid-
ing maximum accessibility to all parts and connec-
tions. The chassis is constructed of 16 gauge,
bonderized steel, finished inside and out with
baked-on grey enamel. Components have been selec-
ted with high safety and overload factors, thereby
providing economical operation by reducing service
calls. The 128X amplifier can be mounted on a
standard 19 inch equipment rack or it can be housed
in a wall - or shelf - mounting cabinet.
128X SERIES AMPLIFIER ELECTRICAL CHARACTERISTICS
FREQUENCY OUTPUT NOi SE INPUT HARMONIC
UNIT SOURCE MAXIMUM RESPONSE BELOW FULL SIGNAL DISTORTION GENERAL
DESIGNATION IMPEDANCE OVER-ALL SAIN 30-ISOOO cps OUTPUT LEVEL LEVEL· 50- I 0000 cps INFORMATION
128X-A 600 ohms 63db matching ± 1.0 db 78 db -20 db11 20 ,rat ts 1 ess Provides for line
600 ob11s 600 ohu 45db (600 Ohll than 29' 15 1 evel input
bridging bridging 600 input) watts less
ohms than 19'
12SX-B 30 or 250 103 db ± 1.0 db 55 db -60 dbm Same as 12SX-A Provides for low im-
ohms pedance inputs. Volu11e
controlled r .. otely to
a distance of 5000 ft.
12BX·E l 11eg ohm 116 db ± I. 5 db ( from 60 db 13 IIV at Same as 128X-A Provides for high imped-
100,000 ohm 400 cps llnce inputs. crystal
source 11icrophones or other
impedance) high 110pedance lo,r
1 evel signal source
128X·H 6800 oh11s 103 db See Fig. A 55 db 5. 8 !IV Same as 128X-A Provides for General
input fro• at 400 Electric variable
variable cps reluctance pbono pick-
reluctance up or Pickering·
tyr,e phono cartridge pick-up
pick-up :
'
128X·J I n,eg ohm 76 db ± 1. 5 db 60 db l-G vol ts S8111e as 128X· A Provides for high i111ped
(max.) ance input for radio
tuners and equivalent
1 npu t devices
128X·R "T0 pad 62 db ± 1. 0 db 73 db 20 db11 Same as l 2SX-A Monitor Mplifler
matched to
30, 150.
250 or 600
ohms
128X· Q 30, 150, 62 db ± 1. 0 db 75 db -20 db,q Sa~e as 128X ·A Mont tor or Booster All-
250 or 600 pl! fler for recording
ohms or sound systems
2
128X BASIC AMPLIFIER
llCAIN DATA
l--x45-i-----X0.8-----xs.4---X0.28 ACROSS 600J'l
400 WINDING OF OUTPUT
1r--4----------t----;::====t::==::;---,
I 1/3
g
b
C9
R8
CHASSIS
-:-
C4 C3B
+ +
RZ
* APPROX. GAIN PER STAGE
USING VTVM, AT A LINE
VOLTAGE OF 117 VOLTS
INPUT POWER: APPROX.
120 V.A. AT 117 V. 60 CPS
C3A +
R3
A.C.
INPUT
For 105-115V Input-Connect leads at transformer to
For 115-125V Input-Connect leads at transformer to
e
f' TO ALL HEATERS
VOLTAGE AND RESISTANCE OF
BASIC 128 AMPLIFIER
TUBE PIN VTVM RESISTANCE
6SJ7 -1- Gnd 0
(VI) 2 3. 15 AC 0.09 Ohms
3 + 1. 2 lK
4 0 Open
5 + 1. 2 lK
6 +45 1. 2 meg
7 3. 15 AC 0.09 Ohms
8 +72 300 K
6V6 1 Gnd 0
(V2) 2 3. 15 AC 0.09 Ohms
FUSE
011-0FF
:&Lee
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@
R4
TZ
00@
OO 6Y6
RIA ANO Ria
A
STRAPPING
N FOR
soon
3 +225 24K
4 +225 24K Fig.
5 +72 300K
6 NC
7 3. 15 AC 0.09 Ohms 6L6 I Gnd 0 5U4G 1 NC
8 +85 lOK (V4) 2 3. 15 AC 0.09 Ohms (VS) 2 +440 15K
3 +420 15K 3 NC
6L6 1 Gnd 0 4 +320 13K 4 380AC RMS 120 Ohms
(V3) 2 3. 15 AC 0.09 Ohms 5 0 I00K 5 NC
3 +420 15K 6 NC 6 380AC RMS 120 Ohms
4 +320 13K 7 3. 15 AC 0.09 Ohms 7 NC
5 0 100 K 8 +26 260 Ohms 8 +440 15K
6 NC ALL VOLTAGE AND RESISTANCE MEASUREMENTS
MADE IITII
7 3. 15 AC 0.09 Ohms REa>ECT TO CHASSIS GROUND, WITH A LINE VOLTAGE OF
8 +26 260 Ohms 117 V. A. C-. 600 OHMS LOAD ACROSS OUTPUT.
3
INPUT PANELS FOR LANGEVIN
AMPLIFIER TYPE I 28X SER I ES
In the design of the 128X seri~s of ampli-
fiers, provisions have been made for two input
channels. These channels are furnished as 3eparate
input panels which are interchangeable on the am-
piifier. Six different types of input panels are
avail~ble, any two of which may be used at one
time. The type numbering of the 128X series varies
with the input panels connected to the basic am-
plifier unit. For example, the basic unit with a
line level iriput panel type A, would be a 128X-A
amplifier; with a line level input panel Type A,
and a high-impedance pre-amplifier panel Type E,
it would be a 128X-AE. A basic amplifier with two
low impedance pre-amplifier inputs Type B would be
a 128X-6B, etc. The input panels and their desig-
nations follow.
DES I GNA Tl ON
TYPE A
DESCRIPTION
Line level input panel with trans-
former connections for matching
600 ohms, or bridging 600 ohms
(equipped with volume control).
TYPE B
TYPE E
TYPE H
TYPE J
•TYPER
TYPE Q
Pre-amplifier input panel for
source impedances of 30/250 ohms
(equipped with volume control).
Pre-amplifier input panel for high
impedance inputs (equipped with
volume control).
Preamplifier, equalizer input panel
for variable reluctance type pickup
(equipped with volume control).
Input panel for high impedance in-
puts such as radio tuners or their
equivalent (equipped with volume
control).
Input panel for monitor (broadcast
use) for source impedance of
30/150/250/600 ohms.
Input panel for monitor or booster
use for source impedance of
30/150/250/600 ohms.
INSTALLATION INSTRUCTIONS
FOR THE I 28X BASIC AMPLIFIER
ELECTRICAL CONNECTIONS
Before the 128X amplifier can be placed in
operation, the following electrical connections
must be made in order to apply a-c power for
operating voltages, .and to provide an output load
for the audio signals.
l. Connect an a-c power cord to the two
terminals on the a-c input terminal strip
shown in Figure 3.
2. Connect the required output load (loud-
speaker's or other)· to the terminals on
the amplifier output terminal strip
(Fig. 3).
The manner in which the input signal devices
are connected is described in the text on the in-
dividual input panels.
OUTPUT IMPEDANCE STRAPPING
Connect the output leads to the terminals
marked A and Bon the output terminal strip (Fig.
3). Bring the leads into the amplifier by punching
out the kno~kout on the rear-right side of the
chassis.
The amplifier is shipped with output imped-
ance strapping for 600 ohms as shown in the basic
schematic diagram, Fig. 2. Strapping for other
output impedance values is shown in the following
chart.
4
NOMINAL
LOAD
IMPEDANCE
600
150
32
16
8
2
LOAD IMPEDANCE
'I\ORKING RANGE
300 to 1200
70 to 300
20 to 70
10 to 20
3 to 10
1 to 3
TRANSFOR~
STRAPPING
5-9, 8-11, 10-14
5-9, 7-11, 8-12, 10-14
6-9, 8-11, 10-13
6-9-11, 8-10-13
6-8-11-13, 7-9, 10-12
6-8-10-12, 7-9-11-13
INSTALLATION & MOUNTING
DATA
A Langevin Type 1201 cabinet is available for
this amplifier. The cabinet can be placed on a
table or a shelf or, if it is desired, mounted on
wall or other flat surface. For wall mounting, two
right angle mounting brackets are supplied with
the cabinet. These brackets are fastened to the
cabinet, as shown in Fig. 4, before installing the
amplifier chassis,
The brackets contain two sets of mounting
holes along the side that fastens to the cabinet.
This allows the cabinet to be mounted spaced from
the wall, or flush against the wall, as desired.
To install the amplifier chassis in the cabi-
net, proceed as follows:
Slide the amplifier chassis into the cabinet
with the end flanges of the chassis between the 2
end rails on each side of the cabinet interior.
Bolt the chassis into place, using the 2 holes
provided in the end rails.
e
.
Fasten the cabinet cover into place by means
of the 2 knurled panel screws, or by the spring
mounting clips, whichever are used.
RACK MOUNTING
When the amplifier is to be rack mounted,
Modification Group Type 21 is required. This modi-
fication kit includes brackets to remount the power
switch, pilot light, and volume controls; and a
mat panal.
Remove the volume controls, power switch, ana
the pilot light from the chassis and fasten them
in the corresponding holes on the two mounting
brackets. Note that these components are mounted
directly on the brackets and are not fastened to
the mat panel.
To effect the modification, mount the narrow
bracket with the 2 small holes over the resistor
strip as shown in the diagram (Fig. 5) and bolt it
into place by means of the two existing bolts in
the bottom of the chassis. Remove the power es-
cutcheon plate from the chassis exposing two small
mounting holes. Mount the remaining bracket as
shown in Fig. 5 by means of these small mounting
holes. Place the amplifier chassis in the rack and
bolt it into place using the extreme top and
bottom slots on the end flanges. Place the mat
panel over the chassis and bolt it to the rack
through the two center slots on the flange. Mount
the two escutcheon plates ~ith the volume control
to the left facing the rack and the pilot light and
on-off switch to the right as shown in Fig. 5.
---------- ---------- -------- I Fig. 5 /
5
INSTALLATION OF IHPUT PAHELS
INPUT
PANEL TYPE
A
'f'[LLOW
..
,.,.
TO 9 Tl
400-0
.....,T1'11AN,,,
fOOlrilOM .. -"L
C,tAMG( O·Z~I
600 NOINIAL
t'lAfifG( 0·1000~
I Fig. 6 I U,or 0(0
INSTALLATION
..
..,.._ ...
••
lOO•
.. roa
••
·2~·
VOL CONT.
'--...+-'-------~q
l\.ut
Mount the input panel in the space provided
at the lef.t hand side of .the amplifier chassis
when facing the front of the amplifier as shown in
Fig. 1. Select any 3 terminals not in use on the
basic amplifier terminal strip. (7, 8 and 9 are
used here for demonstration.) Connect the indi-
cated points on the A input panel resistor strip
(Fig. 7) to terminals 8 and 9 on the input termi-
INPUT PANEL TYPE B
,o~
-T
tt0-60.J\.)
TO
"(ltllOT[
VOL. co .. t
INSTALLATION
••
510A
OT ••
..
..
,, 101(
VOLUIIIE CONTROL~
•• .. .. TOb
,.. ''°" .,. !'tEO OOT
...
2~V DC
\It&
I
Fig. s I
Connect the filament leads of the B panel to
the filament lugs "e" and "f". Connect the red-dot
terminal on the resistor strip to point "b" shown
on the schematic for the basic amplifier;.Fig. 2.
Connect one side of the 0.05 mfd capacitor (sup
plied) to the green-dot terminal on the resistor
strip and the other side of fhis capacitor to point
"a" on the basic amplifier schematic. Connect re-
sistor R9 from point "a" to ground of basic ampli-
fier. When unbalanced input is used, ground terminal
1 of the input transf~rmer.
Select any four adjacent terminals not in use
on the basic amplifier input terminal strip (for
demonstration purposes we shall select terminals
1, 2, 3 and 4). Connect terminals 1, 2 and 3 of
the input transformer (Fig. 8) to terminals 1, 2,
3 respectively, of the input terminal strip. Con-
nect terminal 4 of the input terminal strip to the
white dot terminal on the B resistor strip, and
to the right-hand lug on the volume control (as
viewed from the bottom with lugs upright).
6
0
0
Fig. 71
,-----,-.::+-=:....- TO 7
F":i~....,..-TO 8
r.:, ,,.......,... ra--t--+-'--T09
VOL. CONT.
ON CHASSIS
TO a
R5
TOg
nal strip of the basic amplifier. Tile unattached
lead No. 3 from the input transformer connects to
terminal 7 on the basic amplifier terminal strip.
Mount the volume control in the space provided on
the left front side of the amplifier chassis, and
connect it to the input panel resistor strip and
to points "a" and "g" on the basic amplifier as
indicated in Figures 2, 6 and 7.
GREEN DOT
BLACK DOT TO g
1612 OR 6L7
\ GREEN DOT 0
TO b e f"
ELECTROLYTIC I . '-WHITE DOT TO RIGHT
C 1, C 1A, C 18 Fig, 9 I HAND LUG OF V. C.
Terminal 10 on the input terminal strip should
be grounded at all times. Connect terminal 10 to
the black-dot terminal on the B resistor strip
and also to the center terminal on the volume con-
trol. Connect the 20 Kohm resistor, RS, across
the outside terminals of the volume r,ontrol.
VOLTAGE AND RESISTANCE
OF B INPUT PANEL
TUBE PIN
1612 1
or 2
6L7 3
4
5
6
7
8
Grid Cap
VTVM
GND
3. 15
+215
+60
0
NC
3. 15
+25
0
*Varies with V. C. Setting
RESISTANCE
0
vac 0.09Q
v. 350K
v. SOK
520K
vac 0.090
v •• 20K *
520K
INPUT PANEL TYPE E
.--+--.--Toa
CJ
~
0"""1T
..
. ..., ..
~:.!:...!?~--;.:;,..-L...;:;.~~:;.__i.,;;::.._,.,r_=---roo
510t'l .Dk tSOK 41 K
~
DOT
AiCi,HT HAN0LUC. Of''lC. 11,v DC
....
I Pig. 1oj
INSTALLATION
Select two terminals on the input terminal
strip (for demonstration, assume terminals 4 and
6). Connect the black-dot terminal on the E resis~
tor strip to input terminal 6, then connect
termi'nal 6 to terminal 10 (ground). Connect the
white-dot terminal on the E resistor strip to input
terminal 4, and connect 4 to the right-hand lug on
the volume control (viewed from bottom with lugs
upright). Connect the center lug of the volume con-
trol to ground. Connect the 20 K resistor across
the outside terminals of the volume control. The
filament leads are wired to "e" and "f" as in the
case of the B panel, and the red-dot terminal on
the E strip is connected to point "b" shown on tbe
basic schematic. Theo. 05 mfd coupling capacitor is
connected from the green-dot terminal on the re-
sistor strip to point "a" on the basic schematic.
INPUT PANEL TYPE H
vttlOW
""'
'"P\J'T
••c•...-
c•,.,.••OG[
I TO
---
OCT
Uiifrll)l
Fig. 12 l
INSTALLATIO~
½vr·6SL1 "
0~1,1,t
TOO
...
•OO• OUT•
""'
...
TO 9
TO
w
·-·
.. o
00T TO b
..
kAO' t7"5YDC
,v TO 9
TO e }cn•c
Install the panel in the space provided on
the ba~ic amplifier. Connect the high side of the
input lead directly to the yellow-dot terminal on
the panel resistor strip. Connect the other input
lead to ground as represented by the black-dot on
the resistor strip and connect the black-dot termi-
nal to point "g" on the basic amplifier. Connect
the filament leads to points "e" and "f" on the
basic at11plifier. Connect the red-dot terminal to
point "b" on the basic amplifier. Mount the 250K
volume control, Rll, in the proper place on the
basic amplifier chassis and connect.the two out-
side terminals to points "a" and "g" on the basic
amplifier, as shown in Fig. 13. Connect the 100K
resistor RI2 from the green-dot terminal on the
panel resistor strip to the movable arm of the
volume control (Fig. 13).
TO
a
TO
g
TO
g
/
REDD
TO b
ELECTROLYTIC
C1A,C1B,C1C
GREEN DOT
L_WHITE DOT TO RIGHT
f' HAND LUG OF V. C.
I Fig. 111
Connect resistor R9 from point "a" to ground of
the basic amplifier.
VOLTAGE ANO RESISTANCE
OF E INPUT PANEL
TUBE PIN
1612 1
<>r 2
6L7 3
4
5
6
7
8
Grid Cap
•varies with V. C.
'
BLACK
DOT
1TO g
I e f
ELECTROLYTIC
C5A.C 58
VTVM
GND
3. 15 vac
+220 v.
+76 v.
+44 v.
3. 15 vac
+44 v.
0
setting
I Fig. 131
VOLTAGE AND RES I STANCE OF
H INPUT PANEL
TUBE PIN VTVM
6SL7 1 0
2 105V
3 1. 5V
4 0
5 105V
6 1. 5V
7 3. 15 vac
8 3. 15 vac
RESISTANCE
0
0.09Q
390K
SOK
20K
0.09Q
20K
lMQ
0
TO g
RESISTANCE
7K
420K
4K
700K
420K
4K
O.OSA
0.09Q
7
INPUT PANEL TYPE J
fOo
.,
••
..... .,
•••
TO. INPUT--+--~
I Fig. 141
INSTALLATION
Mount the panel in the space provided at the
left hand side of the amplifier chassis when fac-
ing the front of the amplifier as shown in Fig, 1.
Connect Point 1 on the J panel to "g" and point 2
INPUT PANEL TYPE Q
--
INSTALLATION
Tl
-- Ill
....
I Fig. 161
:t----roa
.Ill
29"
Mount the panel in the appropriate blank
space indicated in Figure 1. Select 2 terminals
not in use on the basic amplifier terminal strip.
(1 & 2 used here .. for demonstration). Connect 1 & 5
of panel to 1 & 2 of basic amplifier terminal
strip. Match input impedance using table below.
Connect output lead from arm of volume control to
point "an (grid) on the basic amplifier. connect
other output lead (6 on panel> to point "g" on
basic amplifier.
8
CON-ECTOR 2
0 0
TO g TO a
j Fig. 1s j
to "a" on the basic amplifier.
Mount volume control, R-2 on the front of the
128X amplifier in the space provided,
0
0
-----11) 1112
.-----OF -,r ,.__ STIIII'
I Fig. 17 I
INPUT INPUT
IMPEDANCE CONNECTla.S
600 ohms Slate(l) &Red(5)
250 ohms Slate(l) &Purple(4)
150 ohms Slate (1 > & Red (5)
30 ohms Purple(4) & Red(5)
0
112
0
STRAPPING
Yellow(2) & Brown(3)
Yellow(2) &Brown(3)
Slate(l> &Brown(3)
Yellow(2> & Red(5)
INPUT PANEL TYPER
a.oo,,oo
T .. U "~D
<>----..... ., ......... .., .... .,1tf•.,-~---'---,
I I '
t, I ;
, t , ,n
'-~4".. uo
-;
'
: YklRW
I
:-
'
'
'
I
I
I
I
••
HO
«>--------·----~--..:--,--'
Fig, 181
INSTALLATION
Mount the panel in the space provided at the
left hand side of the amplifier chassis when fac-
ing the front of the amplifier as shown in Fig. 1.
Connect a properly matched "T" pad to the input
transformer as shown in table. Connect the leads
from the input device to the input of the "T" pad,
Connect the output lead from point 7 on Fig, 18 to
point "g" and the other output lead from point 9
on Fig. 18 to point "a" (grid) on the basic
amplifier.
0
0
INPUT
IMPEDANCE
600 ohms
250 ohms
150 ohms
30 ohms
T1
408-A TRANSF. 0
4
1 2
5 3
6 1-a
9 0
TO a TO g
I Fig. 19 I
INPUT
CONNECTIONS
Slate(l> &Red(5>
Slate(l).& Purple(4,
Slate(l) &Red(5)
Purple(4) &Red(5)
STRAPPING
Yellow(2) & Brown(3 >
Yellow(2) & Brown (3)
Slate(!> &Brown(3)
Yellow(2) &Red (5)
9
ELECTRICAL PARTS LISTS
PARTS LIST FOR 128X BASIC AMPLIFIER
REF
SYMBOL
Cl
C2
C3A
C3B
C4
C5A
C5B
C6
C7
cs
C9
RIA
RIB
R2
R3
R4
R5
R6
R7
RS
R9
RIO
Rll
R12
RI3
Tl
T2
Fl
Swl
Vl
V2
V3
V4
V5
Xl
X2
X3
X4
X5
10
DESCRIPTION
Cap, 16 mfd elec, 600dcwv
Cap, 50 mfd, el ec, 450dcwv
Cap, elec, 2 sect 40 mfd
450dcwv,
40 m
fd, 450dcwv
Cap, 50 mfd elec, 450dcwv
Cap, elec, 3-sect 80-SOmfd
50dcwv
80111 fd 50dc1'V
Cap, oil paper O. 2511fd
600dcwv
Cap, oil paper lrafd 600dcwv
Cap, oil paper lmfd 600dewv
Cap, mica lOOmmf ±10%
600dcwv
Res. ww. 2000 ohms ±10%
75 watt
Res. ww. 13,000 ohms
± 10% 75 watt
Res. carbon, 47,000 ohms
± 5% 1 watt
Res. carbon, 1600 ohms
± 5% 1 watt
Res. 260 ohms ±10% 17. 5 w
Res. carbon, 100,000 ohms
± 5% 1 watt
Res. carbon, 10,000 ohms
± 5% 2 watt
Res. carbon, 20,000 ohms
± 5% 1 watt
Res. r.arbon, 270,000 ohms
± 5% 1 watt
Res. carbon, 1 M ohms
± 5% 1 watt
Res. carbon, 1000 ohms
± 5% 1 watt
Res. ww. 150 ohms± 10% 25w
Transformer, Power
Transformer, Output
Fuseholder
Switch, toggle, bat handled
Tube type 6SJ7
Tube type 6V6GT
Tube type 6L6GA
Tube type 6L6GA
Tube type 5U4G
Socket, octal, bakeli te-raica
filled
Socket, octal, bakel i te-
mica filled
Socket, octal, bakelite-
mica filled
Socket, octal, bakeli te-
mica filled
Socket, octal, bakeli te-
mica filled
MANUFACTURER
Aerovox
Aerovox
Sprague
Sprague
Aerovox
Sprague
Tobe
Tobe
Tobe
El.111enco
Ward Leonard
Ward Leonard
Al 1 en Brad! ey
Allen Bradley
IRC
All en Bradley
Allen Bradley
Al 1 en Bradley
All en Bradley
Allen Bradley
Allen Bradley
Ohmite
Langevin
Langevin
BusSlllan
Arrow-Hart &
Hegeman
GL 600
AFH 1-53
DFP
AFH 1-53
DFP
OM-625
OM-601
OM-601
EM-45
GB-4735
GB-1625
MW5
GB-1045
HB-1036
GB-2035
GB-2745
GB-1055
GB-1025
0200G
1or-E
317-A
HKP
PARTS LIST FOR INPUT PANEL TYPE A
REF
SYMBOL DESCRIPTION
Rl- lA Res. carbon, 12,00~
±5% 1/2 watt
R2-1A Res, carbon, 30~
±5% t/2 watt
R3-1A Res, carbon, 300, 00~
±5% 1/2 watt
R4-1A Res, carbon, 51,00~
±5% 1/2 watt
R5-1A Res, variable,
250KQ
Tl- IA Transf, input
PARTS LIST FOR
INPUT
PANEL TYPE B
REF
SYMBOL DESCRIPTION
ClA-lB Cap, elect, 3-sect
10µ.f 350dcwv
ClB-18 10µ.f 350dcwv
ClC-18 20,u.f 250dcwv
C2-1B Cap, paper
O. 25uf 600dcwv
C3-1B Cap, paper
0. 051.L! 600dcwv
C4-1B Cap, paper
0.05.u.f 600dcwv
Rl-18 Res, carbon, 470,0000
± 10% 1/2 watt
R2-1B Res, carbon, 5100
±5% 1/2 watt
R3-1B Res, carbon, 33,000Q
±10% 1/2 watt
R4-1B Res, carbon, 150, OOOQ
±10% 1/2watt
R5-1B Res, carbon, 270,000Q
±10% 1/2 watt
R6-1B Res, carbon, 47, OOO!J
±10% 1/2 watt
R7-1B Res, variable 40001J linear,
open in ccw position
R8-1B Res, carbon, 22,000IJ
± 10% 1 watt
R9-1B Res, carbon, 240,000Q
±5% 1 watt
Tl-1B Transformer, input
Vl-18 Tube type 1612 or 6L7
Xl-18 Socket, octal bakeli te
MANUFACTURER
Al 1 en-Bradley
Al 1 en-Bradley
All en- B radl ey
All en Bradley
EB
EB
EB
EB
Al 1 en Bradley Type J VC-11
Langevin 400-D
MANUFACTURER
Sprague DFP
Goodall M503
Goodall M503
Goodall M503
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Brajil ey EB
Allen Bradley EB
Allen Bradley VC-3
Allen Bradley GB
All en Bradl ey GB
Langevin 402-B
11
PARTS LIST FOR INPUT PANEL TYPE E
REF
SYMBOL
CIA- IE
ClB- lE
ClC- lE
C2-1E
C3-1E
Rl-lE
R2-1E
R3- lli:
R4-1E
R5- IE
R6-1E
lt7- lE
R8-1E
R9-1E
Jl- lE
Vl- lE
Xl- lE
DESCRIPTION
Cap, elect, 3- sect
lOuf 350dcwv
10.u.f 350dcwv
20.u.f 25dcwv
Cap, paper
0.05uf 600dcwv
Res, carbon 1M0
±10% 1 watt
Res, carbon, 510Q
±5% 1/ 2 watt
Res, carbon, 33,000Q
±10% 1/2 watt
Res, carbon, 150, OOQQ
± 10% I/ 2 watt
Res, carbon, 270,0000
±10% 1/2 watt
Res, carbon, 47,0000
±10% 1/ 2 watt
Res, variable, 400QQ linear,
op en in ccw position.
Res, carbon, 22,00Qi,
±10% 1 watt
Res, carbon, 240,000Q
±5% 1 watt
C~nnector, input
Tube type 1612 or 6L7
Socket, octal bakeli te
PARTS LIST FOR INPUT PANEL TYPE H
REF
SYMBOL
C2-1H
C3&C6-1H
C4-1H
C5-1H
CIA- 1H
CIB-lH
Rl-IH
R2-1H
R3-1H
R4-1H
R5-1H
R6-1H
R7-1H
R8-1H
R9-1H
RlO-lH
Rl 1- lH
R12-1H
Vl-lH
Xl-lH
12
DESCRIPTION
Cap, elect,
25µ.f 25dcwv
Cap, paper
O. 0 5µ. f 600dcwv
Cap, paper
0. 03µ.f 400dcwv
Cap, elect
251tf 25dcwv
Cap, elect, 2-sect
201.Lf 450dcwv
Res, carbon, 470K
±10% 1/2 watt
Res, carbon, 3,9000
±10% 1/2 watt
Res, carbon, I00,00Q0
±10% 1/2 watt
Res, carbon, 270,00()Q
±10% 1/2 watt
Res, carbon, 220,0000
±10% 1/2 watt
Res, carbon, 470,0000
±10% 1/2 watt,
Res, carlion, 10,0000
±10% 1/2 watt
Res, carbon, 3,9000
±10% 1/2 watt
Res, carbon, 270,000Q
±10% 1/2 watt
Res, carbon, 100,000Q
±10% 1/2 watt
Res, var, 250,0000
Res, carbon, 100,0000
±10% 1/2 watt
Tube type 6SL7
Socket, octal
Bakelite
MANUFACTURER
Sprague DFP
Goodall M503
Allen Bradley 68-1050
Allen Bradley EB
Allen Bradt ey EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley VC-3
Allen Bradley GB-
Allen Bradley GB
Amphenol 75-CL-PClM
MANUFACTURER
Sprague TA-25
Goodall M-503
Goodall M-503
Sprague TA-25
Sprague DFP
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley EB
Allen Bradley FB
All en Bradley Type J VC-11
Allen Bradley EB
PARTS LIST FOR INPUT PANEL TYPE J
RE!=
SYMBOL
Rl- lJ
R2-1J
R3-1J
Jl-lJ
OESCRI PTION
Res, variable, lMQ
Res, variable, lMQ
Res, carbon, 300,000Q
±5% 1/2 watt
Connector,. input
PARTS LIST FOR INPUT PANEL TYPE Q
REF
SYMBOL
Rl-lQ
R2-1Q
Tl-lQ
PARTS LIST FOR
REF
SYMBOL
Rl-IM
R2-1M
R3-1M
R4-1M
Tl-lM
DESCRIPTION
Res, carbon 180,000 ohms
±10% 1/2 watt
Res, variable 100,000 ohms
2 watts, audio taper
Input transformer
INPUT PANEL TYPER
DESCRIPTION
Res. carbon, 620"1
±5% 1/2 watt
Res, carboJJ,
±5% 1/2 watt 100,000"1
Res, carbon, 75,000Q
±5% 1/2 watt
Transformer. input
MANUFACTURER
Allen Bradley Type
Allen Bradley Type
Allen Bradley
Amphenol
MANUFACTURER
All en Bradley
Allen Bradley
Langevin
MANUFACTURER
Allen Bradley
All en Bradley
Allen Bradley
Langevin
DWG. NO. P - 128X - A - 15 REV.
JA-1052-1>3048
JA-1052-P3048
EB
75-CL-PClM
EB
JA-1041-P3048
408-A
EB
EB
EB
408-A
13
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Langevin 128X-A Installation and Service Manual

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Installation and Service Manual
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